Shearing device for auxiliary locks



' Aug. 28, 1923. 1,466,207

W. C. DILLON SHEARING DEVICE FOR AUXILIARY LOCKS Filed April 17-, 1922 'nm l lggmm v Patented Aug. 28, 1923.

1 UNITEDSTATES ,ATENTOEFFM.

I WILLIAM cgmLLon, or roar DODGE, IOWA, nssreivon T0 LE ROY DILLON, or roar DODGE, 1 O A.

sHEAnInG :oEvIcEroa AUXILIARY LooKs.

Application filed April 17, 1922. Serial No. 553,592.

To all whomz't may concern:

Be it known that I, lVIL iAM C. DILLON, a citizen of the United States,iand resident of Fort Dodge, in the county of Webster and State of Iowa, have invented a certain new and useful ShearingDevice for Auxiliary Locks, of whichj thefollowing is a specification.

An object of my invention is to provide a shearing device for releasing the flexible member used in connection with auxiliary locks for vault doors.

A further object is to provide such a shearing device wherein the flexible element is passed between a bar which extends across the face of the combination lock of the vault door, and the. upperedge of a slot or the'like in a post which is received in an opening in the bar. V I

A further object, is to provide such a shearing device in which theparts are .so arranged that aslight movement of the combination lock will cause the bar to move relative to the post, and to cut the flexible element in order to release it;

An additional object is to provide an adjustable mounting for securing one end of the bar and means for adjusting the height of the post.

' Reference is here made to my copending application, Serial Number 553,593, filed April17,1922. I With these and other objects in view, my invention consists in the construction, ar range'ment and combination of the various parts of my device, whereby the objects contemplated' are attained, as hereinafter-more fully setfforth, pointed-out in my claims, and illustrated in the accompanying drawings, in which:

- Figure 1 shows a sectional view through a portion of a vault illustrating the inside of the door in locked position, with an auxiliary locking device and the shearing device installed thereon. I V ;Figure 2 is anenlarged-viewof myshear- .ing device installed over the combination lock of the vault door.

, Figure'3 isa sectionalview throiigh' the vault door,- the shearing device appearing in elevationgand; 7 Figure e is a detailed'sectional View illustrating the; coaction of: the shearing bar with the post, taken on the line. iet of Figure 2.

In the accompanying drawings, I have used the. reference numeral10 to indicate generally, a vault door having an inwardly extending flange or strip 11 spaced from its edges; Locking bolts 12 are slidably mounted in the flange 11 and adapted to engage the inner edge of the door casing 13.,

The bolts12 are connected by a bar 14;, which is operated back and forth, for-sliding the bolts, y the actuating fingers 15 and the handle16, (see Figure I The type of auxiliary lock shown in connection with my present invention com prises a bolt 17 set into the flange 11 and extending laterally behind the bar 14. A looking block 18 is mounted on the bolt 17 for rotation thereon, andjis normally held in l:Zuch a position that the bar 14' may slide it. 1 I YA flexible element 19 anchored at one .end, is used to hold the block 18 in this position against the action of a spring 2O which tends to rotate the block 18 on the bolt 17. When the flexible element 19isreleased, the block 18is rotated, and is of such shape that a portion of it will obstruct the path of the bar 14.- and prevent the sliding of the bolts 12 for opening the door.

Below the combination lock 19, a: stud bolt 20 is mounted in the vault. door. -A post 21 is threaded on the stud 20for adjustment as: to height.

Above thecombination lock is "a stud bolt 22 which is .threadedlinto the door 10. A shearing bar 23. is mounted on the stud 22 and secured in placeby nuts 24 and 25,-above and below the. bar respectively. The nuts 24; and25 are so adjustedthat'a little mo tion of the bar 23, relative to thebolt 22 will be permitted.

The bar 23 extends'across the face oi the combination lock'19 and at its lower end hasa circular opening 2 6wliichis of slightly width to receivci'snugly the: flexiblemember 19; A lOOpQS inthe; end of the member 1 is provided, which rests in the slot 271-" r 1 v The sl1ea ri1igbar 23- is so adjusted that it practically touches the faceof, the coin edgeof the slot 27, behind the loop 28. In orderto adjust. the bar 23 to this position,

bination lock and iis .about flush with'the lock must therefore of the bar 141. Y

the nuts 24 and 25 may be adjusted, and the post2l rotated on the stud 20. r

In order to prevent injury to the loop 28 while so adjusting the bar, an annular slot 29 is provided in the post 21, spaced from, the slot 27 in such a position as to receive a pin 30 which is fixed in the bar 23 and extends from edge to edge thereof.

It will be seen that the pin 30 tends to prevent any movement of the bar 23 relative to the post 21. The pin 80is of soft ma terial, however, so as to be easily sheared when the pressure is brought against the bar.

The flexible member 19 is extended from the post 21 around apulley 31 and thence to the auxiliary locking block 18. It will be seen that the post 21 acts as an anchor for holding the element 19 under tension.

In locks of this type, the flexible element is generally passed across the face of the combination lock, and the breaking of the flexible element by the forcing in of the combination lock, is relied upon to operate thel-ock. I have found, however, that it is possible for two men to open the door without operating the auxiliary lock. The way in which this is accomplished is as follows: V

One man procures a length of pipe suitable to be slipped over the endofthe handle 16. i

Using this as a lever, he exerts a tremendous pressure against the actuating fin gers 15. While he is applying this pressure, the combination lock is blown off or punched in. 7 It has been found that the release of the fingers 15 is accomplished enough ahead of the severing of the flexible element to allow'the'bar 14: to be. shot across the path of the auxiliary lock, thus fouling its action. I I It has also been found that, in some types of combination locks, by forcing the lock inwardly, less than one-eighth'of an inch, it may be displaced laterally a sufiicient amount to release the fingers 15.

V In theLp-ractical operation of my shearing device, themovement of the combination look a slight distance will cause the bar '23 to be forced outwardly, the stud 22 acting as a pivot. The pin 80 will first be cut, and then the loop 28,'w her e it crosses the edge of the hole26, will also be sheared, releasing the auxiliary lock.-- v 1 r The advantages of this method of releasing the flexible element lies in-the fact, that only a slight displacementfof the combina tion'lock is necessary in order to cut the flexible element. The operation of the auxiliaryprecede the releasing It will be understood that changes may be'made in the construction of my device,

without departing from the real purpose and allowing the other end to pass through as an opening in the bar 23. It is my intention, to cover by my claims all modified forms of structure which may reasonably be included within their scope.

I claim as my invention:

1. In combination with an auxiliary lock for a vault door having a combination lock thereon, said auxiliary lock including a flexible element for holding said lock in inoperative position, a shearing device for'releasing said flexible element, said shearing device including .a post below the combination look, a stud bolt above the combination look, a bar having an opening therein adapted to receive the post, said bar being extended across the face of the combination'locle 2. In combinationwith an auxiliary lock 7 for a vault door having combination lock thereon, sald auxiliary lock in vice for releasing said flexible element, said shearing device including a post adjacent to the combination lock, a bar suitably mounted on the vault door and crossing the face of the combination lock, said bar havcluding a flexible element for holdingsaid}? lock in inoperative position, a shearing de ing an opening at one'endadapted to receive the post, and said post having a slot flush with the outer faceof the bar, the flexible 'memberjbeing passed through said slot in such a manner'that the movement of the bar relative to the 3 post will cut the flexibleelement. V j

'3. In combination with an auxiliary lock for a vault doorhaving a combination'lock thereon, said auxiliary lock including a flex-V ible element for holding isaid'lock in inoperative position", a shearing device for re- 1" leasing said flexible element, said shearing device including a post adjacent to the combination lock, a bar suitably mounted on'the vault door and crossing the face of the combinati'on lock,- sa1d bar havlng an opening at one end adapted;to*rece1ve"theposaiand said post having a slot flush with the outer-face of the bar, the flexible member beingpas'sed through said slot in suchl'a manner thatthe movement of the bar relative to the post will cutthe flexible element and-the post being adjustabletoward-the vault'd'oor.

4. In combination with an auxiliary lock for a vault door having 'acombination-lock thereon, said auxiliary lockineludinga flexible element for holding said lock in inoperative position, a shearing device for releasing said flexible element, said. shearing device including a post having a groove therein, a bar extended across the face of the element being extended across the face of the bar into said groove.

5. In combination with an auxiliary lock for a vault door having a combination lock thereon, said auxiliary lock including a flexible element for holding said lock in inoperative position, a shearing device for releasing said flexible element, said shearing'device including a post below the combination lock, a stud bolt above the combination look, a bar having an opening therein adapted to receive the post, said bar being extended across the face of the combination lock and mounted on the stud bolt at its other end,

. said post having a slot flush with the outer fac of the bar, the fiexible element being passed across the face of the bar and through said slot, and the bar being adjustable toward the face of the combination look by means of nuts above and below the bar on the stud bolt.

6. In combination with an auxiliary lock for a vault door having a combination lock thereon, said auxiliary lock includinga flexible element for holding said lock in inoperative position, ashearing device positioned adjacent to the combination lock and operable by the abnormal movement thereof for severing said flexible element, said shearing device including a post member to which the flexible element is secured and a pivoted bar for shearingthe flexible element-as and for the purposes stated.

Des Moines, Iowa, April 6, 1922.

i WILLIAM G. DILLON. 

